Update Files

Kinc/Sources/kinc/libs/plat/unix/unix-file.c

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+/*
+ * libwebsockets - small server side websockets and web server implementation
+ *
+ * Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#if !defined(_GNU_SOURCE)
+#define _GNU_SOURCE
+#endif
+#include "private-lib-core.h"
+
+#include <pwd.h>
+#include <grp.h>
+
+#ifdef LWS_WITH_PLUGINS
+#include <dlfcn.h>
+#endif
+#include <dirent.h>
+
+int lws_plat_apply_FD_CLOEXEC(int n)
+{
+	if (n == -1)
+		return 0;
+
+	return fcntl(n, F_SETFD, FD_CLOEXEC);
+}
+
+int
+lws_plat_write_file(const char *filename, void *buf, size_t len)
+{
+	ssize_t m;
+	int fd;
+
+	fd = lws_open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600);
+
+	if (fd == -1)
+		return 1;
+
+	m = write(fd, buf, len);
+	close(fd);
+
+	if (m < 0)
+		return 1;
+
+	return (size_t)m != len;
+}
+
+int
+lws_plat_read_file(const char *filename, void *buf, size_t len)
+{
+	int fd = lws_open(filename, O_RDONLY);
+	ssize_t n;
+
+	if (fd == -1)
+		return -1;
+
+	n = read(fd, buf, len);
+	close(fd);
+
+	return (int)n;
+}
+
+lws_fop_fd_t
+_lws_plat_file_open(const struct lws_plat_file_ops *fops_own,
+		    const struct lws_plat_file_ops *fops, const char *filename,
+		    const char *vpath, lws_fop_flags_t *flags)
+{
+	struct stat stat_buf;
+	int ret = lws_open(filename, (int)((*flags) & LWS_FOP_FLAGS_MASK), 0664);
+	lws_fop_fd_t fop_fd;
+
+	if (ret < 0)
+		return NULL;
+
+	if (fstat(ret, &stat_buf) < 0)
+		goto bail;
+
+	fop_fd = malloc(sizeof(*fop_fd));
+	if (!fop_fd)
+		goto bail;
+
+	fop_fd->fops = fops;
+	fop_fd->flags = *flags;
+	fop_fd->fd = ret;
+	fop_fd->filesystem_priv = NULL; /* we don't use it */
+	fop_fd->len = (lws_filepos_t)stat_buf.st_size;
+	fop_fd->pos = 0;
+
+	return fop_fd;
+
+bail:
+	close(ret);
+	return NULL;
+}
+
+int
+_lws_plat_file_close(lws_fop_fd_t *fop_fd)
+{
+	int fd = (*fop_fd)->fd;
+
+	free(*fop_fd);
+	*fop_fd = NULL;
+
+	return close(fd);
+}
+
+lws_fileofs_t
+_lws_plat_file_seek_cur(lws_fop_fd_t fop_fd, lws_fileofs_t offset)
+{
+	lws_fileofs_t r;
+
+	if (offset > 0 &&
+	    offset > (lws_fileofs_t)fop_fd->len - (lws_fileofs_t)fop_fd->pos)
+		offset = (lws_fileofs_t)(fop_fd->len - fop_fd->pos);
+
+	if ((lws_fileofs_t)fop_fd->pos + offset < 0)
+		offset = (lws_fileofs_t)(-fop_fd->pos);
+
+	r = lseek(fop_fd->fd, (off_t)offset, SEEK_CUR);
+
+	if (r >= 0)
+		fop_fd->pos = (lws_filepos_t)r;
+	else
+		lwsl_err("error seeking from cur %ld, offset %ld\n",
+                        (long)fop_fd->pos, (long)offset);
+
+	return r;
+}
+
+int
+_lws_plat_file_read(lws_fop_fd_t fop_fd, lws_filepos_t *amount,
+		    uint8_t *buf, lws_filepos_t len)
+{
+	ssize_t n;
+
+	n = read((int)fop_fd->fd, buf, (size_t)len);
+	if (n == -1l) {
+		*amount = 0;
+		return -1;
+	}
+	fop_fd->pos = (lws_filepos_t)(fop_fd->pos + (lws_filepos_t)n);
+	lwsl_debug("%s: read %ld of req %ld, pos %ld, len %ld\n", __func__,
+			(long)n, (long)len, (long)fop_fd->pos,
+			(long)fop_fd->len);
+	*amount = (lws_filepos_t)n;
+
+	return 0;
+}
+
+int
+_lws_plat_file_write(lws_fop_fd_t fop_fd, lws_filepos_t *amount,
+		     uint8_t *buf, lws_filepos_t len)
+{
+	ssize_t n;
+
+	n = write((int)fop_fd->fd, buf, (size_t)len);
+	if (n == -1) {
+		*amount = 0;
+		return -1;
+	}
+
+	fop_fd->pos = (lws_filepos_t)(fop_fd->pos + (lws_filepos_t)n);
+	*amount = (lws_filepos_t)n;
+
+	return 0;
+}
+